Journal of Lipid Research, Vol 20, 265-270, Copyright © 1979 by Lipid Research, Inc.
Metabolism of 3 alpha, 7 alpha-dihydroxy-5 beta-cholestanoic acid by rat liver in vivo and in vitro
J Gustafsson
The metabolism of 3 alpha, 7 alpha-dihydroxy-5 beta-cholestanoic acid was
studied in the bile fistula rats and in preparations from rat liver
homogenates. In the bile fistula rats, the main products were
chenodeoxycholic acid, alpha-muricholic acid, and beta-muricholic acid.
Only small amounts of cholic acid were formed. Incubations of 3 alpha, 7
alpha-dihydroxy-5 beta-cholestanoic acid with microsomes and NADPH yielded
as the main product 3 alpha, 6 beta, 7 alpha-trihydroxy-5 beta-
cholestanoic acid. The formation of small amounts of 3 alpha, 7 alpha, 12
alpha-trihydroxy-5 beta-cholestanoic acid was shown. The major product in
incubations of 3 alpha, 7 alpha-dihydroxy-5 beta- cholestanoic acid with
microsomes and the 100,000 g supernatant fluid fortified with ATP was
identified as 3 alpha, 7 alpha, 24 xi-trihydroxy- 5 beta-cholestanoic acid.
This compound was converted into chenodeoxycholic acid and its metabolites
in the bile fistula rat.